Power twister with adjustable resistance

ABSTRACT

A power twister with adjustable resistance has two elastic components, two handles, two adjusting components, and a positioning assembly. The two elastic components are each respectively made of a rod rolled up spirally. The two handles are each respectively a bar, and are each fixed with a respective one of the two elastic components. The two adjusting components are each fixed with a respective one of the two elastic components, and each has a respective socket. The two sockets of the two adjusting components have multiple teeth meshed together. The positioning assembly has an elastomer disposed between the two sockets, a threaded rod, and a knob. The threaded rod passes through the two sockets and the elastomer, and is mounted with the knob.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a power twister, and more particularly to a power twister with adjustable resistance that can help users in different builds with arm and chest workouts.

2. Description of Related Art

A power twister is an equipment of simple structure for a user to train his/her arms and chest. With reference to FIG. 11, a conventional power twister is configured as a straight bar, and has an elastic component 80, a right handle 81, and a left handle 82. The elastic component 80 is made of a rod rolled up spirally, and is hollow. Two ends of the elastic component 80 are respectively fixed with the right handle 81 and the left handle 82. Each one of the right handle 81 and the left handle 82 is equipped with a respective sheath. With reference to FIG. 12, when a user holds the sheaths of the right handle 81 and the left handle 82 by the user's two hands respectively, and uses arm muscles and chest muscles to force the conventional power twister to bend, two ends of the conventional power twister move toward each other. During the above-mentioned process, the user must overcome the resistance provided by elastic resilience of the elastic component 80, so as to train the user's body.

However, the conventional power twister has the following shortcomings. Because of an overall length of the conventional power twister, a diameter of the rod that is used to make the elastic component 80 and a radius of the helix of the elastic component 80 are both fixed, and the resistance provided by the conventional power twister is thereby fixed. When the user tries to bend the conventional power twister, the user should provide a force larger than the resistance. When the user is strong enough to provide a larger force, bending the conventional power twister repeatedly for exercise is easy. On the contrary, if the user is less strong, then the user may not be able to bend the conventional power twister for workout.

To conclude, the resistance provided by the conventional power twister is fixed and not adjustable, so the conventional power twister may not be useful to users in different builds.

SUMMARY OF THE INVENTION

The main objective of the present invention is to provide a power twister with adjustable resistance, so as to solve the problem of the conventional power twister. The power twister of the present invention has a first elastic component, a first handle, a first adjusting component, a second elastic component, a second handle, a second adjusting component, and a positioning assembly. The first elastic component is made of a rod rolled up spirally, is hollow, and has two ends. The first handle is a bar, and has two ends, wherein one of the two ends of the first handle is inserted into one of the two ends of the first elastic component, and is fixed with the first elastic component. The first adjusting component is fixed with the other one of the two ends of the first elastic component, and has a first socket. The first socket has an upper surface, a first through hole disposed through the first socket, and a first toothed portion having multiple teeth protruding on the upper surface of the first socket and surrounding the first through hole.

The second elastic component is made of a rod rolled up spirally, is hollow, and has two ends. The second handle is a bar and has two ends, wherein one of the two ends of the second handle is inserted into one of the two ends of the second elastic component, and is fixed with the second elastic component. The second adjusting component is fixed with the other one of the two ends of the second elastic component, and has a second socket. The second socket has a lower surface, a second through hole disposed through the second socket, and a second toothed portion having multiple teeth protruding on the lower surface of the second socket, surrounding the second through hole, and engaged with the first toothed portion of the first adjusting component. The positioning assembly has an elastomer disposed between the first socket and the second socket, a threaded rod, and a knob. The threaded rod passes through the first through hole of the first adjusting component, the elastomer, and the second through hole of the second adjusting component. The knob has a threaded hole screwed with the threaded rod.

Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a first embodiment of a power twister with adjustable resistance in accordance with the present invention;

FIG. 2 is an enlarged exploded view of the power twister in FIG. 1;

FIG. 3 is a top view of the power twister in FIG. 1;

FIG. 4 is a top view of the power twister in FIG. 1, wherein the power twister is adjusted to a different angle;

FIGS. 5 and 6 are operational side views of the power twister in FIG. 1;

FIG. 7 is a top view of a second embodiment of a power twister with adjustable resistance in accordance with the present invention;

FIG. 8 is a top view of the power twister in FIG. 7, wherein the power twister is adjusted to a different angle;

FIGS. 9 and 10 are operational side views of the power twister in FIG. 7;

FIG. 11 is a perspective view of a power twister in accordance with the prior art; and

FIG. 12 is an operational side view of the power twister in FIG. 11.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to FIGS. 1 to 3, in a first embodiment of a power twister of the present invention, the power twister has a first elastic component 10, a first handle 20, a first adjusting component 30, a second elastic component 40, a second handle 50, a second adjusting component 60, and a positioning assembly 70.

The first elastic component 10 is made of a rod, which is rolled up spirally, and the first elastic component 10 is thereby hollow. In other words, the first elastic component 10 is formed in a helix comprising multiple helix turns, and two adjacent said helix turns are axially in contact with each other.

The first handle 20 is an elongated straight bar and has two ends. One of the two ends of the first handle 20 is mounted with one of two ends of the first elastic component 10. The end of the first handle 20 is inserted into the first elastic component 10, and is fixed with the first elastic component 10. The other one of the two ends of the first handle 20 is sheathed with a sheath 21, so a user may grab the sheath 21 of the first handle 20 for holding the power twister. The first adjusting component 30 has one of two ends mounted with the other one of the two ends of the first elastic component 10. Similarly, the second elastic component 40 is made of a rod, which is rolled up spirally, and the first elastic component 10 is thereby hollow. In other words, the second elastic component 40 is formed in a helix comprising multiple helix turns, and two adjacent said helix turns are axially in contact with each other. The second handle 50 is an elongated straight bar and has two ends. One of the two ends of the second handle 50 is mounted with one of two ends of the second elastic component 40. The end of the first handle 50 is inserted into the second elastic component 40, and is fixed with the second elastic component 40. The other one of the two ends of the second handle 50 is sheathed with a sheath 51, so the user may grab the sheath 51 of the second handle 50 for holding the power twister. The second adjusting component 60 has one of two ends mounted with the other one of the two ends of the second elastic component 40.

With reference to FIG. 2, the first adjusting component 30 has a first socket 31 located on the other one of the two ends of the first adjusting component 30. The first socket 31 has an upper surface, a first groove 32, a first through hole 33, and a first toothed portion 34. The first groove 32 is disposed on the upper surface of the first socket 31. The first through hole 33 is disposed through a bottom portion of the first socket 31 and communicates with the first groove 32. The first toothed portion 34 has multiple teeth protruding on the upper surface of the first socket 31 and surrounding the first groove 32 and the first through hole 33.

With reference to FIG. 2, the second adjusting component 60 has a second socket 61 located on the other one of the two ends of the second adjusting component 60. The second socket 61 has a lower surface, a second groove 62, a second through hole 63, and a second toothed portion 64. The second groove 62 is disposed on the lower surface of the second socket 61. The second through hole 63 is disposed through a top portion of the second socket 61 and communicates with the second groove 62. The second toothed portion 64 has multiple teeth protruding on the lower surface of the second socket 61 and surrounding the second groove 62 and the second through hole 63. Further, the first through hole 33 and the second through hole 63 may be polygonal.

The positioning assembly 70 comprises a threaded rod 71, an elastomer 72, and a knob 73. The elastomer 72 may be a compression spring, and is disposed between the first groove 32 of the first adjusting component 30 and the second groove 62 of the second adjusting component 60. Two ends of the elastomer 72 abut the bottom portion of the first socket 31 and the top portion of the second socket 61. The threaded rod 71 passes through the first through hole 33 of the first adjusting component 30, the elastomer 72, and the second through hole 63 of the second adjusting component 60. With reference to FIG. 2, the knob 73 may be a star knob. The knob 73 has a threaded hole 731. The threaded hole 731 may be disposed through the knob 73. The knob 73 and the threaded rod 71 are mounted by threads.

Moreover, with reference to FIG. 2, the threaded rod 71 has an end cap, threads, and a polygonal block located between the end cap and the threads. The polygonal block has a contour corresponding to a contour of the first through hole 33 and a contour of the second through hole 63, so the polygonal block of the threaded rod 71 may be wedged within the first through hole 33 of the first adjusting component 30 or the second through hole 63 of the second adjusting component 60. In this way, the threaded rod 71 cannot be rotated with respect to the first adjusting component 30 or the second adjusting component 60, and the knob 73 may be tightened on or loosened from the threaded rod 71.

With reference to FIGS. 1 and 3, in the first embodiment of the present invention, the first elastic component 10, the first handle 20, the second elastic component 40, and the second handle 50 are aligned. The elastomer 72 of the positioning assembly 70 is compressed as the knob 73 and the threaded rod 71 are mounted together. At the same time, the first toothed portion 34 of the first socket 31 and the second toothed portion 64 of the second socket 61 are engaged together, so the power twister may be sustained in a bar shape without applied with any force.

With reference to FIGS. 2 and 4, in case a user has less strength to operate the bar-shaped power twister, the resistance of the power twister of the present invention may be adjusted down. When the knob 73 is loosened from the threaded rod 71, the restoring force of the compressed elastomer 72 will separate the engaged first toothed portion 34 and the second toothed portion 64 by pushing the first socket 31 and the second socket 61 away from each other. Then the user may swing, rather than bend, the first elastic component 10 and the second elastic component 40 to form an angle therebetween. Afterwards, the knob 73 may be retightened on the threaded rod 71 as well as the first toothed portion 34 and the second toothed portion 64 are re-engaged. With reference to FIG. 5, the user holds the power twister by grabbing the sheaths 21, 51 of the two handles 20, 50. When the user applies an inward force to overcome the resistance provided by the two elastic components 10, 40, the two handles 20, 50 approach each other. Due to the angle formed between the two elastic components 10, 40, the resistance is lower, and a user who has a smaller strength becomes able to exercise with the power twister.

With reference to FIG. 6, for a user having even less strength, the angle between the two elastic components 10, 40 may be adjusted even smaller, and the resistance of the power twister may be lowered once again.

With reference to FIG. 7, a second embodiment of a power twister of the present invention differs from the first embodiment in the following descriptions. The first handle 20A and the second handle 50A are respectively a bended bar. Sheaths not shown in the figures are still optional to be equipped on the handles 20A, 50A.

With reference to FIG. 8, similar with the first embodiment, the angle between the first elastic component 10 (along with the first handle 20A) and the second elastic component 40 (along with the second handle 50A) may be adjusted for suiting users in different builds.

With further reference to FIG. 9, the power twister of the second embodiment of the present invention may be set behind the user's neck and upper back. The user may grab the bended parts of the two handles 20A, 50A and push forward with two arms for training.

With reference to FIG. 10, the power twister may be also disposed in front of the user's body. The user may grab the two handles 20A, 50A and force the two handles 20A, 50A to move toward each other for training.

With the aforementioned technical characteristics, the power twister of the present invention has the following advantages. The angle between the two elastic components 10, 40 are adjustable, and the resistance of the power twister is thereby adjustable for different users according to their capabilities. Therefore, the problem of the conventional power twister is solved, and the power twister of the present invention is widely applicable to people in different builds.

Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. A power twister with adjustable resistance, the power twister comprising: a first elastic component made of a rod rolled up spirally, being hollow, and having two ends; a first handle being a bar, and having two ends, wherein one of the two ends of the first handle is inserted into one of the two ends of the first elastic component, and is fixed with the first elastic component; a first adjusting component fixed with the other one of the two ends of the first elastic component, and having a first socket having an upper surface; a first through hole disposed through the first socket; and a first toothed portion having multiple teeth protruding on the upper surface of the first socket and surrounding the first through hole; a second elastic component made of a rod rolled up spirally, being hollow, and having two ends; a second handle being a bar, and having two ends, wherein one of the two ends of the second handle is inserted into one of the two ends of the second elastic component, and is fixed with the second elastic component; a second adjusting component fixed with the other one of the two ends of the second elastic component, and having a second socket having a lower surface; a second through hole disposed through the second socket; and a second toothed portion having multiple teeth protruding on the lower surface of the second socket, surrounding the second through hole, and engaged with the first toothed portion of the first adjusting component; and a positioning assembly having an elastomer disposed between the first socket and the second socket; a threaded rod passing through the first through hole of the first adjusting component, the elastomer, and the second through hole of the second adjusting component; and a knob having a threaded hole screwed with the threaded rod.
 2. The power twister with adjustable resistance as claimed in claim 1, wherein the first socket has a first groove disposed on the upper surface of the first socket; and the first through hole disposed through a bottom portion of the first socket and communicating with the first groove; the second socket has a second groove disposed on the lower surface of the second socket; and the second through hole disposed through a top portion of the second socket and communicating with the second groove; and the elastomer is disposed between the first groove and the second groove.
 3. The power twister with adjustable resistance as claimed in claim 1, wherein the other one of the two ends of the first handle is sheathed with a sheath, and the other one of the two ends of the second handle is sheathed with another sheath.
 4. The power twister with adjustable resistance as claimed in claim 2, wherein the other one of the two ends of the first handle is sheathed with a sheath, and the other one of the two ends of the second handle is sheathed with another sheath.
 5. The power twister with adjustable resistance as claimed in claim 1, wherein the first handle and the second handle are each respectively a bended bar.
 6. The power twister with adjustable resistance as claimed in claim 2, wherein the first handle and the second handle are each respectively a bended bar.
 7. The power twister with adjustable resistance as claimed in claim 3, wherein the first handle and the second handle are each respectively a bended bar.
 8. The power twister with adjustable resistance as claimed in claim 4, wherein the first handle and the second handle are each respectively a bended bar. 